| The Post Office Register Regulations 1925. | S.R. & O. 71925/788 (Rev. XV, p. 448: 1925, p. 1106). |
| The Post Office Register Regulations 1932. | S.R. & O. 1932/44 (Rev. XV, p. 448: 1932, p. 1080). |
| The Post Office Register Regulations 1941. | S.R. & O. 1941/252 (Rev. XV, p. 470: 1941 I, p. 630). |
| The Post Office Register Amendment (No. 1) Regulations 1943. | S.R. & O. 1943/531 (Rev. XV, p. 472: 1943 I, p. 638). |
| The Post Office Register (Amendment) Regulations 1956. | S.I. 1956/1178 (1956 I, p. 1484). |
| The Post Office Register (Amendment) (No. 2) Regulations 1956. | S.I. 1956/1669 (1956 I, p. 1485). |
| The Post Office Register (Amendment) Regulations 1957. | S.I. 1957/1764 (1957 I, p. 1447). |
| The Post Office Register (Amendment) Regulations 1960. | S.I. 1960/1980 (1960 I, p. 405). |
| The Post Office Register (Amendment) Regulations 1962. | S.I. 1962/111 (1962 I, p. 103). |
| The Post Office Register (Amendment) Regulations 1968. | S.I. 1968/1001 (1968 II, p. 2663). |
| The Post Office Register (Amendment) Regulations 1969. | S.I. 1969/1310 (1969 III, p. 3914). |